Feeding mechanism for sewing-machines.



(I. P. WBIS. PENDING a ECHANISM FOR SEWING MACHINES.

APPLICATION FILED NOV. 5, 1909,

htented Mar. 11, 1913.

2 SEEETS-SHEET 1.

WITNESSES:

J. P. WEEK. FEEDING MECHANISM FOR. swim MACHINES.

Patented Mar. 11, 1913'.

APPLICATION PI LED HOV. 5, 1909,

'wlmfssss:

BEST AVAlLABLE CUP JOHN P. WEIS, OF NYACK, NEW YORK.

FEEDING MECHANISM FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Mar. 11, 1913.

Application filed November 5, 1909. Serial No. 526,401.

To all whom/2'15 may concern:

Be it. known that I,-JonN P. Wins, a citizen of the United States, residing in Nyack, county of Rockland, and State of New York, have invented a new and useful Improvement in Feedin Mechanism for Sewing- Machines, of which the following is a description.

This invention relates to feeding mechanism for sewing machines and particularly to a type of mechanism applicable to stocking welting machines such as made the subject of my a plica-tion filed October 11th, 1900, Serial 1 0. 522,158.

Among the objects of my invention may be noted the following: to provide a simple, cheap, high-speed and easy-running feeding-mechanism particularly applicable to machines wherein the work is fed over and supported by either a horn or small fiat work-support; to provide feeding-mechanism capable of being used in a machine havin a restricted work-su port and capable oi sewing tubular articles of various kinds; to provide a feeding-mechanism embodying a construction wherein all the movements are positive and wherein the timing can be varied and made certain; to provide a feeding-mechanism wherein the feed-bar is sup orted and driven so as to reduce the tionable vi ration to a minimum; and to provide a construction whereby the feed-dog can be so adjusted relatively to the workplate as to produce eitheran ordinary fourmotion feed or a feed of the four-motion type and tilting variety.

With the above objects in view and others which will be detailed during the course of this description, my invention consists in the parts, features, elements and combinations of elements as hereinafter described and claimed.

In order that my invention may be clearly understood I have provided drawings wherein v Figure 1 is an end view of so much of a stockm welting machine, such as is made the sub ect of my aforesaid application, as is deemed necessary to illustrate my invention, the view being an end elevation showing the feeding-mechanism with parts broken away and other parts in section; Fig. 2 is a view similar to. Fig. 1, but illustrating the feeding-mechanism from the opposite side; Fig. 3 is a top plan view of Fig.

ossi ility of rattling and objec- 2 with certain parts broken away and showing in addition the horn and throat-plate or work-support of the machine; Fig. 4 is a rear elevation of Fig. 2; and Fig. 5 is a perspective view of the feed-bar and its lifting eccentric.

Referring to the drawings the numeral 1 indicates the bed-plate of the machine, 2 the. looper-supporting plate, 3 thespreadcr-support-mg plate, the two said plates being socured in any suitable manner and arranged at an acute-angle to each other. A journalbearing 4 is secured to the plate 3 by means of one or more screws 5, the driving shaft 6 being journalcd at one end in said bearing.

The work-plate 7 has the depending endweb 8 secured to the bed-plate by means of one or more screws 9 and is supported on the post 10 extending upwardly from the bed plate 1, a screw 11 making the connection between the two. The work-plate at its forward end supports the throat-plate 1?, which extends beyond the depending web 8 as clearly shown in Figs. 3 and 4, said throat-plate being sustained in position by means of the extension 14 of said web 8 and also by the laterally projecting horn 15 which is arranged-at the front end of said throat-plate 13, the latter being secured to said extension and horn by means of screws 16. The throat-plate is' provided with slots 17 through which the feed-dog 18 operates, the latter being secured adjustably to its bar 19 by means of its grooved shank 20 which embraces the forward end of said bar and to which it is secured by means of the screw 21 extending through an elongated aperture or slot 22 whereby said dog can be raised or lowered on said bar relatively to the throatplate through which it works. The feed-bar 19 has adjustably secured to it the angular arm or wire 23 the adjustn'ientbeing secured by the vertical portion of said arm extending into the socket 24 where it is held by the screw 25 passing through the enlarged forward end 19 of said feed-bar and engaging the said arm. The bottom edge of said en arged end of the feed-bar is given a V form as indicated at 23, said edge being re ceived in the groove 24 of the feed-lifting eccentric 25 fixed to the driving shaft 6, the form of the eccentric being illustrated in Figs. 1 and 5 by dotted lines and indicated by 26. The horizontal portion of the angular arm or wire 23 is also received in the groove 24 of the eccentric 2:") and is arranged lOU llG

on the side of said eccentric opposite the edge Y 23? of the feed-bar 19. Thus th'e-fed-bar-is given its riseiand' 'fall andis supported steadily and ivithout possibility of" lateral movement or, vibration, theirising and-falling motions beingjbothlpositive and'easy. It will be noticed-by viewingrFigs. 13 and that the feed-dog 18 isjlaterally offset from its shank and from the feed-bar aswell as being extended iforwardlyfinto'; its operative positiomitl1e 1feed dog being also larchetl'fqn its bottom,; as indicatedat: 27, for "tlieip'u1" pose of permitting-the--1oo'pei{ 28 as operate close to the throat-plate;asiclearlyshown in Fig. l. At its rear" end the'feed-bar is pivotally supported at-29on.. t11 eap er end of the curved driving-lever 30 whic atits lower end is pivotally supported at? 31 upon the bearing 32 by ineansofthe, journal-pin or screw 3 33 passing through said bearing and into said lever 30. Tlie journal 32 is part of the su porting-bracket 34 secured adjustably to t ie bed-plate lvby means of screws 35, the adjustment being vertical and secured by passing the said screws 35 through elongated slots 36 in said bracket 34. By this means the bracket can be set in the desired position to secure the proper location of the feed-dog relatively to' the work-support or throat-plate and also to enable the said feed-dog to be tilted if desired. Sliding upon the driving-lever 30 is the block 37 which embraces said lever and is prevented from falling away therefrom by means of the cross-plate 38 either riveted or screwed thereto as indicated at 39. The block 37 has extending laterally therefrom the driving journal-pm 40 upon which is journaled the rear end of the driving-strap 41 the forward end of which encircles an eccentric 42 fixed to the driving-shaft 6, the operations of whichwill transmit longitudinal reciprocations to said strap 41 and vibra-.

tory movements to said lever 30 and, throu h the latter, longitudinal reciprocations to t e feed-bar 19. The position of the slidingblock 37 is held by means- 0f the adjusting screw 43 passin through I the, rear portion of said block an en'gaging'the driving lever 30. By releasin the screwfromfit's engagement with said fiver, theblock can-be readil y raised and lowered and the screw reset, I

The throat-plate carries a guiding'fdevice for the edge of the work generallyfindi c'ated by 44 and portions of..-a"trimm ng'meclianism also carried by themachin'e" are indicated by the numeral 4;), thesejparts being all common to the stocking weltingjmachine illustrated in my, aforesaid application. 7

Theflooper 28' is supported by; the carrier 46 journaled at its lower] end a 'on'fthe pin 47 operating in the bearings-48b the looperpr n la 2; a -.th.e1sprea 1 r '49 is carried by t e spreader-carrier 50 journaled upon the inclined plate 3. A trimmer-lever 45 isjournaled in bearings of the work-supporting plate 7, and the stationary or ledgerblade thereof is shown at 51 the same being carried by'a horn 15 forming part of the work-support in combination with the throat-plate. These parts are not shown herein in-detail but are illustrated only partially for the purpose of enabling their juxta-position to be seen and determined relatively to the feeding-mechanism and the stitching position. These several parts are shown and described in detail in my applicationfor stocking welting machines Serial Nog a'eeass filed Gctober 11, 1909.

.From the foregoing the mode of operation of my feeding mechanism will be clearly understood with the following additional brief description: The work intended to be 0 erated upon by the stitching mechanism o f the machine will be placed at rest u on the throat-plate and can be easily manipulated b the left-hand of the operator so as to hol the same up to its proper working position with its edge or edges against the guide 44. The rotation of the driving shaft will cause the eccentric 25 to lift the feed-bar so that its dog will project through the throat-plate 13 whereupon the eccentric 42 will impart movement to the strap, which will in turn rock the driving lever 30, which in turn will ive longitudinal recip'rocations to the feedar 19, the depression of the feed-bar and its dog being produced by the eccentric 25 operating upon the angular-bar 23. The eccentric 42 and the eccentric 25 are so timed relatively as to cause the feeddog to rise into engagement with the work feed'the latter rearwardly across the throatplate, then be depressed from engagement with the work, and then moved forwardly again into osition to rise again into ongagement with the work, this bein the action of the ordina four-motion feed-dog. The'amount of fee movement or length of feed is regulated by adjustment of the block 37 upon the lever 30. The amount of the grip of the dog upon the work, or the pressure it will exert on the latter, can be regulatedby the adjustment of the said dog vertically on its bar. The horizontal working positlon'of the feed-bar can be obtained quickly by the adjustment of the bracket 34 whichsupp'orts the'driving-lever on the bedplateof the machine; and in addition to ma e to resent more or less of its serrated surface 0m its rear end toward its front.

Th a t feed-dog end through the throat-plate for engagement with the work, or by adjusting the bracket 34 downwardly more or less, the forward end of the feed-dog will be raised more than the rear end so as to cause said dog to present more or less or" its serrated surface from front to rear through said throat-plate for engagement with the work. In other words, according to the adjust ment of the bracket 34, the feeddog can be i given more or less of an inclination from front to rear or from rear to front, or can be caused to operate in planes parallel with the surface of the throat-plate.

From the foregoing it will be seen that the feedmechanism is very strong and rigid, has little or no vibration, is positive in action, and is exceedingly simple.

Having thus described my invention what I claim and desire to secure by Letters Patent is:

l. A'feeding mechanism for sewing machines comprising a fiat, narrow feed-bar; a feed-dog fixed to said bar and offset vertically and laterally from said bar and ex tending beyond the forward end of the-latter; a fiat, narrow, curved segment adjustably supported at one end and atits other end pivotally connected to the feed-bar; a connection adjustably secured to the segment for operatin' said feed-bar; and means for actuating sai bar.

2. A feeding mechanism for sewing machines comprising a fiat, narrow, feed-bar provided with a V-shaped bottom edge, a carried by said bar; actuating means or said bar including a feed-lifting eccentric having a V-shaped groove in its periphery for cooperation with the bottom otally connected to one end of said bar;

means for pivotally supporting said segmental arm; a driving eccentric; and an adustable connection between said eccentric and said segmental arm.

3. .A feeding mechanism tor sewing ma- .chines comprising a fiat; narrow feed-bar provided with a V-shaped bottom edge; a feed-dog supported by said bar; a feed-lifting eccentric having a V-shaped groove in its periphery cooperating with the bottom edge of said bar; mechanism for imparting the feed movements to said bar including a segmental arm, means for regulating the movement thereof, and means pivo tally connecting the feed-bar to the upper end of said arm; and means for bodily adjusting said arm at an angle to the direction of feed movement of said feed-bar;

4. A feeding mechanism for sewing machines comprising a feed-bar; a dog carried thereby; means for giving said bar its vertical movements; means for giving said bar its feeding movements, the latter means including a vibratory arm pivotally connected to the feed-bar and having a pivotal sup port; and means for bodily ad usting said arm in the direction of its length, whereb tocause the feed-bar to tilt relatively to the machine work-plate, whereby the action of the feed-dog on the work may be changed. In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

( JOHN P. WEIS. lVitnesses:

EDWARD L. RUssnLL, JoHN WV. KANE. 

